/Engine/Plugins/Developer/PluginUtils/Source/PluginUtils/Public/PluginUtils.h
Dirty assets that need to be saved will be unloaded anyway
Whether plugin assets were successfully unloaded
static bool UnloadPluginsAssets ( const TConstArrayView< [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [IPlugin](API\Runtime\Projects\Interfaces\IPlugin) >> Plugins, [FText](API\Runtime\Core\Internationalization\FText) * OutFailReason )